Verified answer

The duplication cheat is one of the only ones I know. If you drop a paintbrush it fill float in midair and you can jump onto it. Also you can get free money from that orc lady in the Kvatch campsite. First you need to equip your best weapon, then get on a horse, then ride to Kvatch, and talk to her while riding the horse with your weapon equipped. Barter with her and sell the equipped weapon. You will get the money but the weapon will stay in your inventory. Also in the vampire cure quest at the very end when the count gives you your reward he gives you like 1000 gold. If you keep asking for it he will keep giving you the reward. Keep in mind these may be fixed with a patch.

basically cheat.. theres a glitch the place you shoot an arrow at a wall, yet in mid shot you pause and turn arrows and then drop an merchandise or something, in any case makes it so in case you had 5 of that merchandise (say an high priced potion) and 10 arrows, they multiply, and 50 potions drop on the floor, yours for the merchandising. look it up works great countless stuff and moneys =p

Why cheat? Takes away the satisfaction of not cheating. ^_^

Otherwise, try http://www.cheatcc.com/

Cheers